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Color-misregistration-detector-and-color-misregistration-easing-system

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Color misregistration detector and color misregistration easing system

Details

Inventors: Nakamura, Kazunari; Matsunaka, Kenji;
Assignee: Olympus Optical Co., Ltd. (Tokyo, JP)
Primary Examiner: Groody; James J.
Assistant Examiner: Lee; Michael H.
Attorney, Agent or Firm: Armstrong, Westerman, Hattori, McLeland & Naughton

(1) A color misregistration detector comprises a matrix circuit for inputting a color image signal acquired on a time-series basis and generating color difference signals R-Y and B-Y, differentiating circuits for differentiating the color difference signals and detecting the quantities of changes in the color difference signals, comparators for detecting quantities of changes exceeding set values among said quantities of changes in the color differences, a counter circuit for counting the number of points indicating large changes in color differences these comparators compare and detect, and a CPU for monitoring a time-series change in the count and identifies presence of color misregistration. (2) A color misregistration easing system includes a correcting means for synthesizing a raw color image signal and a color image signal of a last image without color misregistration or selecting either of the signals according to the result of the identification the CPU provides.

DETAILED DESCRIPTION An object of the present invention is to provide a color misregistration detector capable of detecting color misregistration in a portion of a screen to which color misregistration correction must be applied.
Other object of the present invention is to provide a color misregistration detector capable of detecting occurrence of intense color misregistration due to water supply.
Other object of the present invention is to provide a color misregistration detector capable of distinguishing an image with color misregistration from a normal image or other image without color misregistration so that when water supply is in progress or color misregistration correction is needed, color misregistration correction will not be applied to an image portion which does not require color misregistration correction.
Other object of the present invention is to provide a color misregistration detector capable of detecting color misregistration on a pixel or given block basis.
Other object of the present invention is to provide a color misregistration detector capable of detecting misregistration whose intensity exceeds an observer's discernible level of color misregistration.
Other object of the present invention is to provide a color misregistration detector capable of detecting color misregistration in color image information easily so that color misregistration correction can be performed optimally.
Other object of the present invention is to provide a color misregistration easing system capable of detecting color misregistration whose intensity exceeds an observer's discernable level of color misregistration and preventing deterioration of image quality.
Other object of the present invention is to provide a color misregistration easing system capable of detecting water supply, performing color misregistration correction, and preventing deterioration of image quality.
Other object of the present invention is to provide a color misregistration easing system capable of detecting a cause of color misregistration and controlling color misregistration correction according to the result of the detection

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